Postgres 11.2 given error "Failed to initialize transaction_deferrable to 0"

Hi All,

I have installed postgres 11.2 and i am executing parallel queries with huge
data. So while executing, sometimes postgres given error "Failed to
initialize transaction_deferrable to 0" and sometimes query executes
successfully. Following error log generated by postgres.

LOG: SET TRANSACTION [NOT] DEFERRABLE must be called before any query
2019-10-29 18:43:03.921 FATAL: failed to initialize transaction_deferrable
to 0
2019-10-30 05:43:03.924 ERROR: failed to initialize transaction_deferrable
to 0
2019-10-30 05:43:03.924 CONTEXT: parallel worker
2019-10-30 05:43:03.924 STATEMENT: <Query>
2019-10-30 05:43:03.924 LOG: background worker "parallel worker" (PID
31604) exited with exit code 1

I just need to know about this bug.

Thanks,
Amul Patel

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